Combined automatic signaling and telephone system.



E. E SALISBURY. COMBINED AUTOMATIC SIGNALING AND TELEPHONE SYSTEM.

APPLICATION FILED NOV. 25. 1901.

Patented May 18, 1909.

6 SHEETS-SHEET 1.

B. E. SALISBURY.

COMBINED AUTOMATIC SIGNALING AND TELEPHONE SYSTEM.

APPLICATION FILED NOV. 25, 1901.

Patented May 18, 1909.

6 SHEETS-SHEET 2 if. B. SALISBURY.

COMBINED AUTOMATIG SIGNALING AND TELEPHONE SYSTEM.

APPLICATION FILED NOV. 25, 1901.

921 ,894, Patented May 18, 1909.

6 SHEETS-SHEET 3.

E. E. SALISBURY. COMBINED AUTOMATIC SIGNALING AND TELEPHONE SYSTEM.

APPLICATION FILED NOV. 2.5.1901.

Patented-May 18, 1909.

6 SHEETS-SHEET 4.

NNN

E. E. SALISBURY.

COMBINED AUTOMATIC SIGNALING AND TELEPHONE SYSTEM.

APPLICATION FILED NOV. 25 1901.

921 8% Patented May 18, 1909.

6 SHEETS-SHEET 5.

E. E. SALISBURY.

COMBINED AUTOMATIC SIGNALING AND TELEPHONE SYSTEM.

APPLICATION FILED NOV. 25, 1901. 921 9 Patented May 18, 1909.

6 SHEETS-SHEET 6.

II I HIIIIIIIIII'IIIP HI EI llllll-l-rlllgl llill lla lllllllllhlf UNITED STATES Parana oi ricn EDGAR E. SALISBURY, OF CHICAGO, ILLINOIS, ASSIGNOR-TO SIGNALPHONE ALARM COMPANY, A CORPORATION.

COICBINED AUTOMATIC SIGNALING .ANjD TELEPHONE SYSTEM.

T 0 all whom it may concern:

Be it known that I, EDGAR E. SALISBURY, of Chicago, Illinois, have invented certain new and useful Improvements in a Combined Automatic Signahng and Telephone Sysin fire alarms or the like, although, as will hereinafter appear the system is capable of application to-other uses.

Among the salient objects of the invent-ion are to provide a system which reduces to a minimum the possibilities of becoming accidentally disarranged or failim to send in a full and exact signal, the signaling apparatus being to this end made. as nearly automatic throughout as possible 3 to rovide a combined system-so constructe and arranged that the tele hone may be used independently of the a arm system; but is at the same .time so combined therewith that the tele phone cannot by any possibility be operated to interfere with the signaling mechanism, in case the operator triesto both telephone and send in an alarm; to provide in a system of the character referred to improved details of construction and arran ement which render it possible to send in different kinds of \in such mannerthat either circuit may be relied upon for use and the disabling of one does not necessarily disable the other; to provide operating mechanism which prevents the possibility of confusing the character of the alarm being sent in, as, for example, when a regular alarm is being sent in to prevent the mechanism being so. changed as to send a still alarm and vice versa when a still alarm is being sent to prevent a regular alarm from being switched in; and, in general, to provide an improved apparatus of the character referred to.

To these ends the invention consists in the matters hereinafter described and more par- Specification of Letters Patent. Application filed November 28,1901. Serial No. 88,806.

Patented May 18', 1909.

ticularly pointed out the appended claims,

and the same will be readily understood from i the following description, reference being had to the accompanying drawings, in

Figure 1 is a general perspective view of a call-box embodying my invention, the box being shown open, and the internal mechanism mounted upon the inner door exposed to view. Fig. 2 is a front elevation of the box closed. Fig. 3' is a'perspective of the box with the outer door only open. Fig. 4 is a view showing the automatic signaling mechanism in side elevation, the view being taken looking at that side of the mechanism which is ap lied and attached to the inner face of the oor, or, in other words, looking at the face of the mechanism opposite that shown in Fig. 1. Fig. 5 'is a top plan view of the mechanism shown in Fig. 4, fragmenta portions of the swinging door upon whic said mechanism is mounted and adjacent portions of the casing being shown in section. 1

Fig. 6 is a side elevation of said mechanism looking at the right-hand side of the mechanism, as shown in Fig. 4. Fi 7 is a vertical section taken on line 77 of *ig. 6 and looking in the direction of the arrows. Fig. 8 is a view partly diagrammatic, and partly of actual construction showing the inner face of the inner door with the upper mechanism removed and including also a detail of an au-to-,

matic switch mechanism operated, by the opening and closing of the door, the latter mechanism being shown in inside face elevation. Fig. 9 is a diagrammatic view of the circuit connections at the headquarters station; the automatic switch mechanism mounted upon the door of the alarm box-being repeated from Fig. 8 so as to show more clearly the relative connections. Fig. 10 is a detail top plan view of the cut-0ut switch which is opened by the closing of the inner door. Fig. 11 is a fragmentary detail in top plan view of a second switch mechanism. Fig. 12 is a view similar to Fig. 4 showing the parts in changed position. Figs. 13 and 14 are face and edge elevations respectively of the contact wheel.

A brief explanation of the generalfunctions and operation of an apparatus embodying my present invention will, it is thought, aid materially in a ready comprehension of the exact mechanism employed. Describing then the apparatus generally, it comprises a box having two doors, an outer door controlled by a lock, and which, when open, affords access to a manually operable lever, which, whenpulled down and released, serves to send in a general alarm automatically,=androvided which, when the outer door haseen o ened and the regular alarm lever pulled own, serves to prevent the inner door om being opened until the signaling mechanism has completed its automatic operation,'the object of this arrangement being, of course, to prevent interruption of the signals being sent in as a regular alarm.

In case it be desired to send what'is known as a still alarm, namely, an alarm which merely calls the attention of headquarters to the signaling instrument at that station, but does not sound the general alarm, this stillalarm is sent by opening the inner door and removing-the recelver of the telephone set.

from its supporting hook, whereupon the signaling mechanism, released by the removal of said receiver, automatically sends in the stillalarm. Mechanism is p1;o1ided which automatically locks such parts as might be made to interfere with the si naling mechanism during the sending in o the still alarm, but at the end of the sending in of this series of signals, the mechanism is again restored to operative condition .so that the telephone may be used in the ordinary manner of a regular telephone.

The s stem comprises an all-metallic circuit and a ground to ground circuit over the same lines, the all-metallic circuit being employed for sending in the regular alarm, and the ground to ground circuit for sending in the still alarm. Thev automatic switch mechanism is, therefore, provided, whichis o erated by the opening of the inner door to s ort circuit orcut-out that part of the all metallic circuit which includes the signaling mechanism, but this short circuitin takes place at a point in the line outside t e tele phone set circuit, s0 thatwhile the telephone paratus. employs the all-metallic circuit e in use, its operation can, nevertheless, not a'ifect the si aling ap aratus to send in a false alarm. h e. call box which. ena has a still alarm to be sent in while the inner door .isopen, notwithstanding *the' s'i ling apparatus has been shert-circuited so far as the metallic circuit is concerned, comprisesone or more contact fingers which normally stand free from the .contacting make and break Wheelv or element which is o erated mechanically and autoall lgdr d itsbooli,

the removal of the receiver ounc connection at the so that this ground connection is normally an open one and does not interfere withthe use of the tele hone, but transand opene during the. traverse of the contacting wheel past the contactin finger.

Inasmuch as the opening/ an closing of both the inner and outer doors serves "to operate certain switch mechanisms, means are provided for automatically locking each of these doors against closin at improper times; means bein provided for automatically locking open t e outer door as soon as it has been opened, so that it cannot be closed release-key operate the lock, and means against being opened durin the time a regular alarm is beingsent in. arious other-cotributing to render the apparatus fool proof so that it cannot be improperly 0perated at any time either by the excited citizen, by careless inspectors or repairers or by tamperers.

With the above general description in mind I will now proceed to describe more in detail the partic ar mechanism employed in the. -present instance-for carrying out the invention. p -Referring to the drawings, Fig. 1 desifi nates as a whole the main ody' of the ca boxwhich is of suitable, strong and weatherproof construction, is madeto 0 en at its ont side, and provided with-don le doors2 and a 3 respectively closing said opening 5 these doors being-hinged at the same side, as indicated clearly iii ig. 3. Upon the inner face of the inner door is mounted the movement or spring actuated mechanism, which nals caused by this mechanism being of the ignation of the particular box being operated, bein determined by the number of makes an breaks and intervals between makes and breaks, after the Morse system.

I Referring more particularly to Fig. 1, and Figs. 4 to 7. inclusive, 4 and 5 respectively designatafront and back frame'plates which form the principal frame supports upon mounted; said frame plates being spaced apart and held rigidly with each other by means of a lurality of crossframe members or space bo ts as 6, 7 and 8'. 9 designates a central portion thereof, and extending some distance beyond-or outside of said plates at each of its ends. Upon said shaft adjacent to, and. immediately outside of the back plate is ke ed apinion 10, and outside of said pinion is oosel mounted a receiver-hook arm 11, the en usual fork 12' to receive'the receiver body.

mits the si al'by being a ternately closed.

until the authorities with what I term the being provided for locking the inner door f operating mechanisms are provided, conserves to send in the alarm signals; the sig-' make or break order, and the number or tieswhich the mechanism of themovement is main shaft or arbor journaled to extendthrough .the front and back plates near the of which terminates in the.

. likewise, .mounted upon the gear 13.

shaft.

The end -of the receiver arm is operatively cent thereto, but mounted rigidly upon themain shaft a ratchet wheel 14 adapted to engage a'pawl 15, mounted upon the side. of the gear 13, and held in engagement with the "ratchet by means of a suitable spring F16, he watch spring 17 ;mounted upon the inner face of the back plate-by means ofa stud 18 secured .to its outer end andoperatively connected at its inner end with the main shaft,

1. tends to constantly rotate the main shaft in the direction of movement operating to lift the receiver arm after the latter has been depressed. By reason of the ratchet and pawl engagement between the main shaft and gear 13, the latter is therefore rotated positively during the upwardmovement of the receiver arm, but remains stationary during the downward movement of said arm. 19 designates a second shaft or arbor journaled inthe frame plates adjacent to the periphery of the gear 13, and carrying a pinion 20 rigid. therewith and intermeshing with said gear 13. Upon said shaft 19 is also mounted a gear 21 likewise rigid with the shaft and arranged to inter-mesh with the pinion 22 of a third shaft 23, which also carries an escapement-wheel 24. 25 designatcs an escapement-pallet mounted upon a rock-shaft 26 adjacent to and in position to cooperate with said escapemrnt-wheel a pendulum shaft 27 being connected with the lower end of the pallet which carries at its lower end a pendulum 27. The train of gearing thus described serves to regulate the return a rotation of the main shaft after it has been rotated in one direction by the receiver hook arm, or by another lever to be hereinafter de scribed,.so as to impart a uniform and relatively slow return movement to'said' main U on the front end of the shaft 19, outside 0 the front plate, is mounted the contact or cliaracter-rlieel 28. which serves to make and break the circuit; said -wheel being rigidw-ith the shaft upon which it is mounted. In the present instance said contact-Wheel is of duplex character constituting in eifect two contact-wheels side by side, each .ofwhich is provided with series of contact teeth-,as 29 and 30. stancealso each of the duplicate wheels has a second series of contact teeth as 29 and 30 vrespe'ctively, which second series are ar-' ranged in diametrically opposite relation to the other series of thesame wheel, and are In the present iii-- rangement is to secure greatercertainty of xheclsthe respective (pairs of brushes being 1 arranged in exactlyametrically opposite relation, so that they ill simultaneously make and break contact, or, in other words operate synchronously with each other. The duplicate contact wheels are in electrical connection 1;. ith each other, and are;

as shown herein, in fact, made integral with each other, and are alike, r; iththe exception that one 'of saidwheels, namely, that one upon which theseries of contact teeth 30 and 30 are formed, is provided at diametrically opposite points, as indicated at 33, a 34 (Fig. 13) with cut-away portions, which prevent the brushes 32 and 32 which cooperate with that contact a heel, from resting in contact rith the latter during the time said wheel occupies its normal stationary position.

point that the several brushes which cooperate with the contact wheel, are mounted upon insulating blocks 45 and 46, while the contact wheel itself'is in electrical connection I With the other metallic parts of the movement,'as will hereinafter appear.

In addition to the receiver arm hereinbefore described as mounted upon the main shaft, another arm or lever is provided which is also capable of actuating the main shaft alternately. Referring to Fig. 4, 47 designates a manually operable lever pivotal y mountedat one end upon the back late by means of a suitable stud 48 and bent etween its ends as indicated at 49, to avoid interfering with the main shaft and extending obliquely across and upwardly, approximately in alinement with the normal position of the receiver hook arm; it being understood that the normal position of the receiver arm is depressed, with the'receiver supported thereon. At its free end said arm is provided with a right angle extension or handle portion 50', which extends back through a suitable slot 51 in the inner 12 door, and protrudes beyond the latter sufliciently to enable it to be grasped and pulled down. .The handle end portion 50 of said lever is insulated from the main body thereof, as indicated at 52 and 53 in Figs. 4and 5 1 The slot 51 is formed concentric with the pivotal axis 48 of said lever. U on the ivot stud 48 and moving indepen ently of the lever 47, is mounted a gear segment 54, which is arranged to intermesh with the pinion 10 of the main shaft when said lever 1s oscillated downwardly; the angular width of said segment and the throw of the lever connected therewith, being such as to rotate the main shaft and thereby windthe motor sprin a sufficient amount to impart two comp ete revolutions to the contact wheel during the unwinding movement, which is ermitted after. the return ofthe lever. The segment is moved positively during the downward movement of the handlevar, by means of a stud 54 mounted u on said lever and engaging the upper side 0 the segment, but the return movement of the segment is accomplished by the return rotation of the signaling mechanism after the hand lever has com leted its return; the segment being -yieldingl connected with the handlever by means of a coiled contractile spring 54 which, at the end of the upward movement of the segment lifts the latter free from the gear 10. In this connection it may be explained that the revolution imparted to said main shaft by the movement of the receiver arm in one direction, is only sufficient to rotate the contact wheel shaft one-half revo- -.lution, and it will be remembered that the rotation of the contact wheel is not accomplished during the downward movement of either the receiver hook lever or arm, or the lever 47 (which for convenience, will hereinafter be termed the hand. lever), but after said levers have returned to their uppermost positions. The limit of movement :of the and lever upwardly is determined by means 'of a fixed stud 55, and it is normally drawn toward its uppermost position by means of a coiled con'tractile'spring 56, while the limit of upward movement of the receiver arm is determined by a shoulder 57 formed u on a peculiarly shaped pivotall mounted etent 58, mounted upon the bac frame plate, and which shoulder 57 is engaged by'a stud 59, carried by saidreceiverarm. 1 Z

Describing now the mechanism whereby .the movement of the receiver arm and hand lever are controlled in such-manner that only one of said levers can be operated at a time, the other being locked immovably from the time one lever leaves its normal position until it has returned to this osition. 60 designates a through-pin, best s own in Fig. i which is inserted through the main shaft of "the movement adjacent to the outer face of theback frame plate and, projecting at each of its ends some distance beyond its shaft, as shown clearly in said figure. The shorter end 61 fofsaid through-pin, normally rests in engagement with one arm 63' of a Y-shaped detent or lockingm'ember 62, which is pivwith said through-pin by means of a coiled spring 65. 66 designates the second arm of said detent, which is arranged to extend up wardly; the end of this arm being provided with a shoulder 67, which, when saiddetent is permitted to oscillate by de ression of the hand lever and consequent wit drawal of the end of the through-pin, tends to swing under a stud 68, mounted u on the hand lever. The arm 66 does not, however, engage the stud 68 until said arm has returned toits normal upper-most position, since it is the downward movement of the hand lever which withdraws the end 61 of the throughpin which holds said detent and the latter is, therefore, not permitted to swing under the stud until the stud has descended below the shoulder. Upon the return of the hand lever, however, the arm 66 snaps into engagement with the stud and remains thus engaged until the end 61 of the through-pin has returned to its normal position by the subsequent gradual return movement of the mechanism. The long end 61 of the action of the watch or motor spring 17, when the receiver arm is permitted to rise. At the time while said through-pin is resting in engagement with the. stud 69, it also engages the depending arm 58f of the V-sha ed detent 58, hereinbefore referred. to, t er'eby" holding the latter inwardly against the tension of a spring 70 acting-upon said detent and tending to oscillate it" in a direction to bring its op osite arm intobearing with the stud 59 of t e receiver arm; The engaging arm. 58" of said. detent is provided with a hook-shaped notch 71, which is adapted to engage with .the'stud 59 and lock the receiver arm against downward movement, when said detent-is permitted to swing outwardly under the action of the'spring .70. Inasmuch as the receiver arm is normally depressed, the through-pin is normal -rotated away from the stud 69, and t e V- shaped detent is, therefore, in readiness to snap into locked engagement with the receiver-arm when the latter is permitted to rise, which it does quickly when the receiver is lifted therefrom, and it will remain thus locked until the gradual unwinding of the movement carries the through-pin into position to retract the V-shaped detent. The receiver-arm may, therefore, be operated repeatedly, but never during the unwinding movement of the mechanism.

Means are provided for locking the movement from starting to automatically actuate the contact Wheel, until whichever leverhas been drawn downwardly to set the movement, has completely returned to lts upper.-

eeaeee most limit. In the case of the receiver arm this is accomplished as follows: Upon theshaft or arbor 19 at a point outside of the back plate, is rigidly mounted a detent wheel 72, which carries two outwardly projecting studs 73, 74. Ad'aoent to said detent wheel, upon a suitab e stud 75, is pivotally supported a latch or detent 76, which is provide at a point intermediate its length upon its lower side witha shoulder 77 adapte to engage with either of the studs 73, 74, to hold the shaft 19, from rotation; this shaft being the one upon the opposite end of which the contact wheel is mounted. Upon the receiver arm at a point slightly removed from the main shaft, is mounted a lifting stud 78 which, when the receiver arm isin its uplifted position, engages the under side of the detent 76 and lifts it sufficiently to permit the studs 73 and 74 to pass by the shoulder 77 without engaging. As soon, however, as the receiver arm begins to move downwardly, the stud 78 permits the detent 76 to descend and thus prevents the detent wheel 72 from rotating; 1t bein' understood that the studs 73 and 74 are so ocated with 7 one of the studs 73 or 7 4 which hap ens to be u permost, as said hand lever is epressed. e length of the arm 79 is such as to just ermit the studs 73 and 74 to ass by its ower end when the hand lever is tully lifted. Inasmuch as the normal osition of the receiver-arm is depressed, an the detent 76 is, therefore, in positionto arrest the movement of the detent wheel 72, it is necessary to provide means for lifting said detent 7 6, whenever the movement is to he actuated by the hand lever 47. To this end, therefore, the through-pin 11 is provided with an extension 11 bent rearwardly, with reference to the direction of rotation of the shaft during the downward movement of the re ceiver arm, which extension acts as a cam to engage the free end of the detent 76 and lifts the latter out of the way of the pins 73 and 7%. The normal position of the throughpin ii is that shown in Fig. i, and in which position it does not interfere with the oper-- ation of said detent 76 when actuated by the receiver arm, as hereinbefore described. The movement constructed and arranged as descrihed is secured rigidly against the inner e of the inner door, conveniently loy means plurality of brackets, as indicated at 81.,

82 and 83, through which and into the door are inserted suitable securing screws ;.it being understood that when thus secured .in'

position the hand hold 50 of the hand lever will protrude through the slot 51 and outside of the door, as indicated in Fig. 3.

Describing next the mechanism which operates to prevent the inner door from being opened during the time a regular alarm is being sent in, the arm 66 of the ti-shaped detent 62 is provided at its upper end with an extension 66 having a right-angled out turned portion 66", which extends within the fork 85 of a lever 84 (see Fig. 8) which is pivotally mounted, as indicated at 86 upon the inner face of saidinner door. at apoint intermediate its length. The oscillation of thedetent 62, which accompanies the downward movement of the hand lever, rocks the oscillatory lever 84 in a direction to lift its free end 87 upwardly into the position indicated in dotted lines in Fig. 8, in which position it stands within the path of the locking bolt 88 which holds the inner door locked; it being understood that said bolt isv shifted endwise to release or unlock the door in a formal manner. i

The signaling movement as a whole, is insulated from the inner door upon which it is mounted, by means of 1 suitable insulation interposed between the brackets which support said movement and the face of the door to which they are attached, as well, also, as

the oscillatory lever 84 and in order to prevent the forming of an electrical circuit through said oscifiatory lever whenit is engaged lay the locking bolt 88, the rear end of the latter which engages said oscillatory lever, is formed of a block of insulating material, as indicated at 89. The locking bolt 88 is operated by means of a turn-button shaft 90, journaled to extend throughthe door and provided upon its inner end with. a slotted crank-arm 91 which engages a pin 92 upon the bolt; said crank-arm being normally held or pressed in a position to throw the bolt outwardly by means of a spring 93 a plied thereto; the outward movement of t e bolt being limited by a stud 94, which enages one of the guides 95, through which the boit plays,

In order to lock the hand lever against movement at all times While the inner door is open, I mount upon the outer face of the inner door a rod or plunger 97, which is arranged to reciprocate through a suitable guide 98 and is normally pressed in the direction of the hinged edge of the door by means of a coiied expansion spring 99 interposed between the guide 98 and a coliar 100 upon said plunger. That end of the plunger adjacent to the hinged edge of the door is adapted to engage with the door jamh as the latter is closed, so as to shift the piunger endwise against the tensionof the spring 99. The

opposite end of said plunger is connected with one end of a rocking detent 101 which is pivoted between its ends at 102 to the outer ace of the door, and is arranged to project at its 0 posite end and beneath the hand hold b 50 o the hand lever, in such position as to lock the latter against movement whenever the door is swung open and-the plun er thereby permitted to shift inwardly. The oscillation of the lockin detent, under the action of the spring 99 ifii a suitable stud 103. Obviously, when the door is closed the detent' will be automatically withdrawn out of the path of the hand ever.

At the time the telephone is'being used, it is necessary that one of the circuits, which in the normal operation of sending signals is closed, should be opened, and I provide means for automatically opening this circuit by the operation of the mechanism incident to the removal of the'receiver from the receiver arm.

Referring more particularly to Figs. 1 and 8,,and particularly to the diagrammatic rep resentation of the contact wheel and connected parts shown in Fig. 8, 104 designates a fixed contact iece mounted upon a suitable insulating b ock 105 upon the outer face of the front frame late, and 106 designates a springcontact upon aninsulating b ock 107, and normally resting in engagement with the contact 104. The engaging'end of the springcontact 106 is curved outwardly, as best shown in detail Fig. 11, and upon the end of the main shaft which projects through the front plate, is mounted a radial arm 108, which in the nor mal position of the receiver arm, stands away from said contact. finger, but when the receiver arm has been removed and the main shaft thereby permitted to rotate, is carried V into en agement with the outwardly curved end of t e spring finger and opens the circuit between it and the fixed contact 104. It may be explained at this point, that the o aeration of the hand lever does not effect t e opening of the circuit between contacts 104, 106; since the depression of the hand lever rotates the drm 108 in a direction away from the spring contact finger, and upon its return it is always arrested in the position shown in Figs. 1 and 8, and it is only when the receiver arm'is released and rises, that the arm 108 opens the circuit as described.

As mentioned in.the preliminary description of-theap aratus, the metallic circuit is short circuite ,so as to cut out'the signaling apparatus during the time the inner door is open for the purpose of either sending a still a arm or using the telephone. This is accomplished by means of the following mechanism. Referring to Fig. 8, 109 designates.

mited by means ofv nger similarly mounted eansea mounted a pair of spring contact blades 110,

111 respectively, which, when unrestrained, ear against each other, as shown clearly in plan view Fig. 10. Upon the inner face of the inner door is mounted a wedge-shaped member 112, also of insulating material, and so arranged that the'pointed end thereof 113 will pass between the intermediate ends of the spring blades 110 1 11 and force the latter apart, as the door reaches its closed posi tion, thereby interrupting'the circuit at this point. Inasmuch as the call-box mechanism is never employed, except when the box is opened, I take advantage of this circumstance to normally cut. the entire mechanism out ,of circuit with the line wires so as to avoid any danger of the box being injured by lightning or other stray currents which might pass over the .lines. To this end, therefore, I mount u on the inner face of the side wall of the call-box, adjacent 'tothe swinging edge of the door, a switch mechanism, shown in detail in Fig. 8 at the lefthand side thereof; said switch mechanism blades as 115,116, 116 and 117, two pairs on each side being arranged to face toward the two pairs at the op osite side, so that a blade-like switch-mem er designated as a whole 118, may reciprocate between said pairs to alternately 0 en andclose circuits therethrough. The b ade member 118 is of two-part construction, the opposite ends thereof 119 and 120 being insulated from each other by means of an interposed insulation block 121." The stationary blades 117 and 115 are respectively connected with the right and left hand sides of the signaling circuit of the apparatus by means of conductors 122 and 123, while the opposite ends of the movable member 118 are respectively connected with the right and left main lines by means of conductors 124 and 125. The blades 116 and 116' are inte ral with each other and, therefore, close t e circuit between the main ri ht and left lines when the switch-blade mom or is shifted into engagement with the same.

In order to actuatelthe movable switchmember, the latter is' provided with an extension 126 woqlring through a guide 127 and adapted to be engaged atits end by a stud or pro ecting arm 128 mounted u on the inner face of the outer door of the ca -box, as best indicated in Fig. 3. The length of the stud 128 issuch as to force the movable blademember into vo en position or into engagedoor is'fully closed. In order to move the switch-blade member positivel into engagement with the contact bla es 115, 117

' ment with the lades 116 and 116' when the order to release said spring-catch at the.

the extension 126 is rovided with a spring-'- catch 129 which pro ects beyond the end of said extension, and is provided with a hooked end 130 adapted to engage a corresponding notch 131 formed in the stud 128. And in proper moment when the door has been opened sufficiently to properly close the switch, a stud 132 is mounte upon the baseblock 114 and arranged to project into the path of the inclined outer end of the springcatch so as to engage the latter and force it outwardly out of engagement with the notch, thereby disengaging the stud from the switch-blade member at the roper point. Upon the closing movement of the door the end of the stud 128 engages the extension 126 and shifts the switch in the opposite direction; the spring-catch passing into engagement with the notch 131 as soon as it is moved away from the stud 132.

The mechanism of the apparatus concerned in the signaling and telephoning operations, having now been described, a description of the arrangement of the circuits will be in order.. Referring more particularly to the diagrammatic Figs. 8 and 9, and assuming that the outer door is open and the inner door closed, in which position the circuit would be 0 en at the switch-blades 110, 111, instead of closed as shown, and the apparatus in condition for sending in a regular alarm, the circuit may be traced as follows: from the right-hand main line, entering the box through the switch blades 120, 117, and conductor 122 to the conductor 43 connected with the binding post 39; thence through conductor 41 to contact piece 104, spring-contact finger 106, and back to a binding post 39 through a conductor 133. From the binding post 39 a conductor 134 leads to one of the brushes 31, which, it will be remembered, are normally in bearingline through the movable switch-blade and.

conductor 125. The contact brushes 31 and 31 are so adjusted as to bear upon the contact wheel and the latter is provided with teeth so constructed that the rotation of the wheel past the brushes breaks the. circuit betweeneach tooth, thereby sending in a series of impulses "which operate the responsive mechanism at headquarters and, in the case of sending in the regular alarm, it will be remembered that the contact wheel is rotated by the motor spring 17, after the movement has been set by the actuation of the hand lever. ists when a still alarm is sent in,and in which case the inner door, as well as the outer door is open, the circuit from the main right-hand. linein through the switch mech anism and several conductors to the contact wheel, will be the same as before described. However, in view of the fact that the circuit is now closed between contact blades 110 and 111, so that a com ilete metallic circuit is formed from the binding post 39 through the conductor 41, contact devices 104, 106 and conductor 133 back to the binding post 39', and from the latter to the contact strip 110 through a conductor 136, it will be seen that the operation of the contact wheel will fail to open the circuit and the instruments at headquarters res onsive to the metallic circuit, will, there ore, not be operated. However, a normally open circuit is provided from the contact wheel to ground Next describing the circuit as it ex- I follows: from the contact brushes 32 and 32, which, it will' be remembered are nor mally out of bearing with the contact wheel, through conductors 36 and 37 to a binding post 35, and from this binding post through a conductor 38 to ground, as indichted at 137. As the contact wheel rotates and the several teeth thereof are brought into hearing with the brushes S2 and 32, this circuit is closed to ground, it being understood that the opposite end of the line at headquarters is also grounded, thereby forming the necessary circuit to operate the still alarm mechanism. In this connection it may be pointed out that inasmuch as the contact wheel is, at the time of sending in a still alarm in electrical connection with both right and left hand main lines, this ground to ground circuit will operate equally well should either one of the main lines happen to be disabled, so long as one remains intact. The still alarm, it will be remembered, is sent in automatically by simply lifting the receiver of the telephone from the receiver-arm, thereby permitting the latter to rise.

It now remains to describe the metallic telephone circuit, which is placed in readiness for operation as soon as the telephone receiver has been removed from the receiverarm, and the automatic movement of the mechanism in sending in the still alarm has been completed. As the main shaft, which carries the arm 108 (seeFig. 1) approaches its final position, 01' that position which it 00'- cu ice at the end of sending in the still alarm, said arm 108 opens. the circuit contact be" tween the switch members 104, 106 as hereinbe ore described. The telephone circuit is then as follows: from the right-hand main line through binding 0st 39 and a conductor 137 to the primary 0' the induction coil 138, through said primary and thence to the transmitter 139 through a conductor 140, and from the transmitter to binding 0st 39 through a conductor 141. From the inding post 39, the circuit is back to the contact rushes 31 and 31 by a conductor 134, through the movement, and from the front plate'4 back to binding-post 40, and thence out to the main line throu h conductor 44 contact stra 111 and conductor 123, thus completing t e circuit. The circuit through the receiver, which is as usual an induced current, may be traced from the secondary of the primary out through a'conductor 142 to and throu h the receiver 143, 'and back to the secofi ary through a conductor 144.

The use and o eration of the telephone is obviously precise y identical with that of any ordinary telephone and need not, therefore, be described. a

The apparatus has now been fully described, and .in connection with the description. of the several features thereof, its use and carrying out its'several functions has been clearly described, and it is, therefore, deemed entirely superfluous to repeat these operations. I

I claim as my invention:

1. In an electric alarm system the combination of a call-box, a signaling mechanism arranged therein and comprising. armovable contact device provided with two series of contact projections adapted to send over the line definite series of impulses, a spring motor whereby said signaling mechanism may be automatically operated, means for releasing said signaling mechanism to permit it to operate'automatically under the action of' said spring motor, a contact brush adapted to cooperate with one series of contact pro-' jections of said movable contact device normally out of 10013110811 contact with sai contact device a ground to round circuit extendi from the hea quarters station throug said contact brush, movable contact device and the ground, a second contact brush arranged to cooperate with the second series of contact projections of the movable contact device and normally forming a closed circuit there-through, a complete metallic circuit extending from headquarters throu h said last mentioned contact brush, movab e contact device and back to headquarters, a closure for the call-box arranged to control accesa'to said releasing mechanism, and a switch operativel connected with said closure, normally be d open when the closure is closed and operatiiifi to automaticall close the complete meta c circuit when t e closure isopened, for the purpose set forth.

senses 2. In an electric alarm and telephone s 'stem, the combination of a call-box provided with outer and inner closures, automatic signaling mechanism and a subscriber's telephone Set arranged within said call-box, a ground to ground circuit extending from headquarters to and through the signaling mechanism, a complete metallic circuit like through the signaling mechanismfa manually operable device controlling the operation of said automatic signaling mechanism, accessible and operable when the outer closure is opened, and a second manually operable device controlling the operation of said signaling mechanism accessible and operable when both inner and outer closures are opened, a switch mechanism, operatively connected with the inner closure and operating to short-circuit said signaling mechanism when the inner closure is opened, whereby mechanism responsive to the signaling mechanism of the call-box through the metallic circuit may be operated when the outer closure only is open, and other mechanism responsive to the grounded circuit may be c erated when the inner closure is open, for t e purposes set forth.

3. In a combined electric alarm and telephone system, the combination of a call-box provided with outer and inner closures, automatic signaling mechanism mounted upon the inner side of the inner closure, a motor spring operatively connected with said si naling mechanism, a hand lever operative y connected with said signaling mechanism and having a part extending through said inner closure and accessible for operation receiver-arm operatively connected with release the latter for operation when the telephone receiver is removed therefrom, a make and break contact device forming a part of said signaling mechanism, and pro- "vided with two series of contact projections,

with one of said series of contact promotions, and a normally closed contact brush cooperating with the other senes,.a ground to ground circuit extending from headquarters through the normally open..contact brush wheel provided with two series of contact projections, a spring motor whereby said signaling mechanism may be automatlcally operate from the outside of the latter, a telephone a normally'open contact brush cooperatingarranged therein, and comprising a contact.

means for releasing said signaling wise extending from headquarters to and said signaling mechanism and operating: to

raiser mechanism to permit it to operate automatically under the action of said spring motor, a contact brush adapted to cooperate with one series of contact in contact with said w eel, a complete metallic circuit extending from headquarters to said call-box and including said contact brush and contact wheel, a second contact brush arranged to cooperate with the second series of contact projections of said contact Wheel and normally out of circuit therewith, a grounding conductor connected with said last mentioned brush at the call-box station, and agrounding connection at the headquarters end of said metallic circuit, aishunt line and a switch for short-circuiting said signaling -mechanism relatively to said metallic circuit, the portions of said contact wheel constituting the two series of contact projections being electrically connected with each other whereby the ground to ground circuit may be used over either the right or left main lines of the metallic circuit, substantially as described.

5. In a combined electricalarm and telephone system, a call-box, an automatic signaling mechanism arranged therein, comprising a movable contact device adapted to send over the line definite series of impulses,

a spring motor adapted to o eratesaid signaling mechanism automatical means for tensioning said spring, means for releasing said signaling mechanism} to permit it to operate automatically under the action of saidspring motor for sending in a regular alarm, a main line wire circuit extending .as the latter approaches t from headquarters to and through said signaling mechanism, a shunt loo connected with said main circuit at the calf box, a subscribers telephone set electrically connected in said shunt circuit, a telephone receiver arm adapted to support the receiver of said telephone set, said receiver arm constituting a second releasing means which'permits the signaling mechanlsm to operate for sending in a still alarm, and an automatic switch connected with a moving part of said signaling mechanism and o eratmg to open the main line circuit througii said si naling mechanism l ie conclusion of its movement, as and for the pur ose set forth. 6.- In a combined electric a arm and telephone system, a call-box, an automatic signaling mechanism arranged therein comprising a movable make and break contact device, a motor mechanism adapted to operate said make and break device, means for releasing said signaling mechanism to permit it to. operate automatically for sending in a regular alarm, a subscribers tele hone set connected in circuit with the signa ing mechanism but operable independently thereof, an interlocking mechanism serving to positively lock the telephone mecharusm against functional operation during the functional rojections, normally operation of the signaling mechanism, and

5 other lockin mechanism operating to posi-- tively lock t e signaling mechanism against functional operation during functional use of the telephone mechanism for the purposes -set forth.

, 7. In a combined electric alarm and telephonesystem, a call-box, an automatic signaling mechanism arranged therein and comprising a motor actuated by a movable make and break device, a hand lever operatively connected with said signaling mechanism for setting the latter in operative condition, a telephone receiver arm constituting a release adapted to vpermit theautomatic operation of the signaling mechanism, a subscribers telephone set operatively connected in circuit with the signaling mechanism, and automatically operated detents interconnected to operate alternatively, one to lock the receiver arm against functional operation, while the signaling mechanism is operating and the otherto lock the hand lever against functional operation While the telephone is in use, for the purposes set forth.

8. In a combined electric alarm andtelephone system, the combination of a call-box, an automatic signaling mechanism arranged therein comprising a movable make and break contact device, a spring motor adapted to operate said make and break contact device automatically, a hand lever operatively connected with said motor mechanismmand operating to set the latter when oscillated in one direction, but free to return inde endent of the movement of the signaling mec anism,

a retarding mechanismoperating to control the operation of the signaling mechanism after it has been set by the hand lever, a receiver arm constituting a support for the trol ing movement of the signaling mechanism, a subscribers tele hone set connected in circuit with the signa ing circuit, an automatic locking mechanism operating to lock the signaling mechanism against movement afterit has been set by the forward movement of the hand lever until the hand lever has substantially returned to its initial position, and an automatic locking mechanism operating to control the osition of the receiver arm, normally permitting free movement of said arm, but automatically brought into operative relation to the latter during the functional operation of the signaling mechanism, for the purposes set forth.

9. In a combined electric alarm and telephone system comprising a signaling mechanism, the combination with a manually operable actuating device for operating said slgnaling mechanism, and a telephone recelver support operatively connected with said signalmg mechanism to control movements of the latter, of a detaining device controllingthe movementskof the signaling tele hone receiver, and also a release conmechanism, a part moving with said manually operable actuating device and operating to preventmovement of the detaining device in all positions of the manually operable actuating device, except its normal or initial position, and a detent moving with said' recelver support arranged to normally prevent movement of said detaining device and automatically shifted to release the latter when the tele hone receiver is removed from the su port, '0' the urpose set forths '10. n a combined electric alarm and tele* phone sKstem comprising a signaling mechanism, t e combination with a manually operable actuating device for operating said signaling mechanism, and a telephone receiver support operatively connected with said signa lng mechanism to control movements of the latter, of a detaining" device controlling the movements of the signaling mechanism, a part moving with said manually operable actuating device and operatmg to prevent movement of the detaining device in all positions ,of the manually operable actuating device, except its normal or initial position, and a detent moving with said receiver support arranged to normally prevent movement of said et'aining device and automatically shifted to release the latter when the telephone receiver is re; moved from the support, said last men tioned detent' being operatively connected with the manually operable actuating device so as to be shifted out of operative position during the functional operation of the latter, for the urposes set forth.

11. In an e ectric. alarm system, thecombination with a call-box having outer and inner closures and an automatic signaling mechanism, 0 erable to send signals of one character whi e the outer closure is open and the inner closure closed, and of another character when both closures are open, of means for preventin the opening of said inner closure during t e automatic operation of said signaling mechanism, comprising a shiftable detent operatively connected 'w1th said automatic mechanismand brought into operation by the functional operation of the latter,

said shiftable detent being arranged to pre-,

vent the release'of the locking mechanism of the inner door substantially as described.

12. In an electric call-box provided with a closure 'andan automatic signaling mechanism mounted upon said closure, and adapted to operate automatically for a predetermined intervaLafter being manuall released, manually operative'means for e cot-- ing release of said s1gnaling mechanism while said closure is open, manually operable means for'effeeting the release of said' signaling mechanism while the closure ,is closed, a lockinmechanisim controlling the opening of 'sai closure, and an automatic detent operatively connected with said signahng mechanism and brought into 0 eration by the starting of the latter, said etent being arranged to prevent the unlockingof the door during the pie-determined operation of the signaling mechanism, substantially as described.

13. In anelectric call-box provided with aclosure and an automatic sign'alin mechanism mounted upon said closure an 'adapted to operate automatically for a pre-determined interval after being manually released, a hand lever operatively connected withsaid signaling mechanism-for setting the same and accessible when the closure is closed, a second leveroperativel connected with said signaling mechanism ,or releasing said mechanism, and accessible only when the closure is o en,"-and an automatic locking device for ing said manually operable lever.

14. In an electric system, the combination with a box provided with a closure and electrically operated signalin -mechanism'.

therein, of a main line circuit including said box; but normally shunted around said signaling mechanism means for automaticall switchin said circuit through said mec anism as t e box is opened, comprisin a switch mounted within the box rovide with a shiftable conductor-man er permanently connected with 'the main line extending from said box, a part thereof ar-' ranged to project into the path of the closure during the closing movement ofthe latter,-

which movement operates to shift said con ductor-member to cut out said's i naling mechanism, an interlocking mechanism adapted to ositively connect said shiftable member wit the, closure so as to shift the former to cut in said signaling mechanism provided with op ositely dis osed pairs of contact blades an a shiftable' lade member adapted to recilprocate between said pairs of blades, said s iftable member being permanently connected with the main line wires leading into the box, and one pair of said contact blades being ermanently connected with the conductors eading to and through the signaling mechanism, a projectionmounted upon the door and adapted to engage and shift the shiftable switch member mto open its 921,89&

circuit position when the door is closed, a spring latch mounted u on the part engaged by said projection an operating to automatically interlock with the latter when said parts are brought into contact, and a throwoff stud mounted upon a stationary part in the path of the sprin latch and adapted to disengage the latter rom projection during the opening movement of the door for the purposes set forth.

16. In an automatic electric alarm system, the combination with the call-box provided with a hinged door, and the signaling mech-" anism arranged therein, of means for automatically opening a circuit leading toand through said signaling mechanism when said door is closed comprising a switch base mounted upon the interior of the box, and provided 'with'oppositely disposed pairs of contact blades and a shiftable blade member adapted to reci rocate between saidpairs of blades, saidsgiftable member being permanently connected with the main line wires leading into the box, and one pair of said contact blades being permanently connected with the conductors leading to and through the signaling mechanism, a projection mounted upon the door and adapted to engage and shift the shifta-ble switch member into open circuit position when the door is closed, a spring latch mounted upon the part engaged by said pro lection and o erating to automatically inter ock with the atter when said parts are brought into-contact, and a throw-off stud mounted upon a stationary part in the path of the spring latch and adapted to disengage the latter from projection during the opening movement, of thedoor,

the pair of contact blades with which said shiftable switch member is engaged, when in open circuit position, being electrically connected with each other whereby a closed circuit is formed, from one main line to the other which does not extend through the signaling mechanism.

EDGAR E. SALISBURY.

Witnesses:

ALBERT vH. GRAVES, FREDERICK O. Goonwm. 

